<template>
  <view>
  <view class="search-box">
    <uni-search-bar placeholder="请输入搜索内容" :radius="100"  cancelButton="none" @input="input" >
    </uni-search-bar>
    <!-- 搜索建议列表 -->
    <view class="sugg-list" v-if="searchResults.length !== 0">
      <view class="sugg-item" v-for="(item,i) in searchResults " :key="i" @click="gotoDetail(item)">
        <view class="goods-name">
        {{item.goods_name}}
        </view>
            <uni-icons type="forward" size="17"></uni-icons>
      </view>
      
    </view>
    <!-- 搜索历史 -->
    <view class="history-box"  v-else>
      <view class="history-title">
        <text>搜索历史</text>
          <uni-icons type="trash" size="17" @click="clean"></uni-icons>
      </view>
      <view class="history-list">
          <uni-tag @click="gotoGoodsList(item)" inverted="true" :text="item" v-for="(item,i) in histories" :key="i"></uni-tag>
      </view>
    </view>
  </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
      timer:null,//防抖
      kw:'',
      searchResults:[],
      historyList:[]
      };
    },
      
    computed:{
      histories(){
        return [...this.historyList].reverse()
      }
    },
    onLoad() {
      this.historyList=JSON.parse(uni.getStorageSync('kw')||"[]")
    },
    methods: {
     
      input(res) {
       clearTimeout(this.timer)
        this.timer=setTimeout(()=>{
           console.log('----input:', res)
           this.kw=res
           this.getSearchList()
        },500)
       
      },
     async getSearchList(){
        if(this.kw===''){
          this.searchResults=[]
          return
        }
        const {data:res}=await uni.$http.get('/api/public/v1/goods/qsearch', { query: this.kw })
        if(res.meta.status!==200)return uni.$showMsg()
        this.searchResults=res.message
        this.saveSearchHistory()
      },
      saveSearchHistory(){
        // this.historyList.push(this.kw)
        // set集合值唯一
        const set=new Set(this.historyList)
        set.delete(this.kw)
        set.add(this.kw)
        this.historyList=Array.from(set)
        // 持久化
        uni.setStorageSync('kw',JSON.stringify(this.historyList))
      },
      gotoDetail(item){
        // console.log(item.goods_id);
        
        uni.navigateTo({
          url:'/subpkg/goods_detail/goods_detail?goods_id=' +item.goods_id
        })
      },
        
      clean(){
        this.historyList=[]
        uni.setStorageSync('kw','')
      },
      gotoGoodsList(item){
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?query=' +item
        })
      }
   
    
    
     
    }
  }
</script>

<style lang="scss">
.search-box{
    position: sticky;
    top: 0;
    z-index: 999;
   .uni-searchbar{
     background-color: #c00000;
   }
   
  }
  .sugg-list{
    padding: 0 10px;
    .sugg-item{
      display: flex;
      height: 50px;
      justify-content: center;
      align-items: center;
      border-bottom: 1px solid #efefef;
      .goods-name{
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        margin-right: 5px;
      }
    }
  }
    
  .history-box{
   padding: 0 15px;
    .history-title{
       display: flex;
       justify-content: space-between;
       align-items: center;
       height: 50px;
       border-bottom: 1px solid #efefef;
    }
    .history-list{
      display: flex;
      flex-wrap: wrap;
      .uni-tag{
        margin-right: 5px;
        
      }
    }
  }
</style>
